Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 469
<^ ;::-- 0\ m -^4^ac «<s ^„ s fk !-. J=: m ;-:>?. ft— <-: ^|||— t^«=V … 448 AMERICAN TELEPHONE PRACTICE. circuit, which is closed only at that station by the action of therelays, finds path through this winding, and the magnetism sodeveloped serves to unlock the mechanism and to allow the partyat that station to use his instrument, In Fig. 330 is shown a six-party…
Telephone
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
